19/20-x=8/5-3/4
19/20 -x = 17/20
x = 19/20 - 17/20
x = 2/20
x = 1/10

\(\dfrac{19}{20}\) \(-x=\) \(\dfrac{17}{20}\)

\(x=\) \(\dfrac{19}{20}\) \(-\) \(\dfrac{17}{20}\)

\(x=\) \(\dfrac{2}{20}\) = \(\dfrac{1}{10}\)